Lateral force resisting systems in lightweight steel frames: Recent research advances

Sharafi, Pezhman; Mortazavi, Mina; Usefi, Nima; Kildashti, Kamyar; Ronagh, Hamid Reza; Samali, Bijan

doi:10.1016/j.tws.2018.04.019

Cited by 68 publications

(18 citation statements)

References 122 publications

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“…The research involved an extensive dynamic testing program to assess the contributions from the non-structural components, particularly the plasterboard lining. The results of this study and some other similar studies show that non-structural components, such as plasterboard lining, make a significant contribution to the lateral bracing of the frames [17][18][19][20][21].…”

Section: Of 18supporting

confidence: 71%

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

et al. 2020

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The modal properties of modular structures, such as their natural frequencies, damping ratios and mode shapes, are different than those of conventional structures, mainly due to different structural systems being used for assembling prefabricated modular units onsite. To study the dynamic characteristics of modular systems and define a dynamic model, both the modal properties of the individual units and their connections need to be considered. This study is focused on the former aspect. A full-scale prefabricated volumetric steel module was experimentally tested using operational modal analysis technique under pure ambient vibrations and randomly generated artificial hammer impacts. It was tested in different situations: [a] bare (frame only) condition, and [b] infilled condition with different configurations of gypsum and cement-boards light-steel framed composite walls. The coupled module-wall system was instrumented with sensitive accelerometers, and its pure and free vibration responses were synchronously recorded through a data acquisition system. The main dynamic characteristics of the module were extracted using output-only algorithms, and the effects of the presence of infill wall panels and their material are discussed. Then, the module’s numerical micromodel for bare and infilled states is generated and calibrated against experimental results. Finally, an equivalent linear strut macro-model is proposed based on the calibrated data. The contribution of this study is assessing the effects of different infill wall materials on the dynamic characteristics of modular steel units, and proposing simple models for macro-analysis of infilled module assemblies.

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Section: Of 18supporting

confidence: 71%

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

et al. 2020

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“…Researchers have also investigated the use of corrugated steel panels on shear walls in place of flat sheets [17][18][19]. A detailed review paper by Sharafi et al [20] provides a broader summary of the various research projects on lateral force resisting systems composed of cold-formed steel frames.…”

Section: Background Of Steel Sheathed Cold-formed Steel Framed Shear Wall Systemsmentioning

confidence: 99%

Cold-formed steel centre-sheathed (mid-ply) shear walls

Brière

Santos

Rogers

2018

Soil Dynamics and Earthquake Engineering

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An innovative configuration for cold-formed steel (CFS) framed and sheathed shear walls developed to address the need for a ductile lateral framing system of high shear resistance appropriate for mid-rise buildings is presented in this paper. This shear wall configuration comprises a sheathing placed at the mid-line of the framing, and hence is known as either a centre-sheathed or mid-ply wall. A laboratory based research program was conducted following an iterative design, analysis and testing process. The testing included fifteen 1218 mm × 2438 mm shear walls subjected to in-plane displacement-based monotonic and cyclic loading. The test specimens were able to reach shear resistances substantially exceeding the capacity of the CFS walls listed in the AISI S400 Standard, while attaining storey drift values superior to 6% in the best case. A preliminary equation-based nominal shear strength prediction method has been developed, reflecting the shear wall's innovative configuration and superior behaviour.

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“…As per their classification, LFRS for LSF systems typically fall into one of the following categories [6]: (1) shear walls clad with face sheathings such as plywood, plasterboard or steel sheets; (2) CFS frame strap-braced wall systems; (3) some frame-connection systems such as special bolted moment frames; (4) podium-type structures, where a complete load bearing CFS lightweight frame is built atop lower levels of other structures; and (5) mixed (hybrid) systems where CFS joists, trusses, and load-bearing walls are used for the primary gravity system, while shear walls, braced frames or moment frames are used for the vertical offsets of the LFRS. Determination of an appropriate LFRS for a given building depends on architectural and structural considerations.…”

Section: Lsf Latrell Load Resisting Systemsmentioning

confidence: 99%

“…Consequently, the bracing of LSF follows more of the traditions found in timber construction compared to methods used for bracing in hot-rolled steel construction [5]. Recent advances in the understanding of their behaviour, and ongoing design related research on lateral force resisting systems (LFRS) are quite promising to guarantee the use of CFS framing into more complex, robust and taller structures [6].…”

Section: Introductionmentioning

confidence: 99%

Prefabricated Hybrid Wall Panel System for Lightweight Steel Construction in Seismic Prone Regions   

Sharafi¹,

Mortazavi²,

Samali³

et al. 2018

Preprint

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A new lateral force-resisting wall panel is presented for applications in mid-rise prefabricated lightweight steel construction in seismic prone regions. This panelised system is composed of a hot-rolled frame and cold-formed studs and tracks, which works as a lateral force resisting system in lightweight steel framing. The proposed hybrid panel system exhibits proper ductility and energy dissipation behaviour. The hysteretic responses of full-scale panel experiments demonstrate that the system can safely resist high cyclic loads. The hot-rolled steel part, on the other hand, can significantly improve the initial lateral stiffness of the total system that will control the maximum allowable drift of multi-story buildings. Finally, in a case study, by applying the proposed system to the design of a mid-rise building in a high seismic area, the performance of the hybrid panels, are compared with those of fully hotrolled systems (moment resisting frames) and fully cold formed systems. The findings indicate that applying hybrid panels will result in lower weights and better performance in seismic prone regions.

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Lateral force resisting systems in lightweight steel frames: Recent research advances

Cited by 68 publications

References 122 publications

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Cold-formed steel centre-sheathed (mid-ply) shear walls

Prefabricated Hybrid Wall Panel System for Lightweight Steel Construction in Seismic Prone Regions

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Lateral force resisting systems in lightweight steel frames: Recent research advances

Cited by 68 publications

References 122 publications

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Operational Modal Analysis, Testing and Modelling of Prefabricated Steel Modules with Different LSF Composite Walls

Cold-formed steel centre-sheathed (mid-ply﻿) shear walls

Prefabricated Hybrid Wall Panel System for Lightweight Steel Construction in Seismic Prone Regions&nbsp; &nbsp;

Contact Info

Product

Resources

About

Cold-formed steel centre-sheathed (mid-ply) shear walls

Prefabricated Hybrid Wall Panel System for Lightweight Steel Construction in Seismic Prone Regions